Shuttle spring

Abstract

This invention relates generally to a shuttle spring for holding a yarn filled bobbin in a loom shuttle wherein the spring has a pair of opposed jaw portions for resiliently holding the bobbin therebetween. A vertical side surface of one of the jaw portions has a greater vertical width than the vertical side surface of the opposing jaw portion to effect rotation of the bobbin, when being ejected from the shuttle by the insertion of a full bobbin, in a direction so as to ensure that an adequate transfer tail of unused yarn separates from the spent bobbin. The transfer tail of yarn trailing from the bobbin is then caught by a stripping machine which completely strips the bobbin of the unused yarn.

What is claimed is: 
     
       1. A shuttle spring for holding a bobbin having yarn wound thereon in a loom shuttle comprising: a single piece of metal having a bent portion formed by bending said single piece of metal upon itself,   a pair of shank portions defined by the sides of said single piece of metal on each side of said bent portion,   a pair of spaced-apart jaw portions having opposed vertical side surfaces for resiliently engaging and holding said bobbin therebetween,   a side arm portion connecting, respectively, each one of said jaw portions to one of said shank portions, and   one of said vertical side surfaces having a greater vertical width than the opposing vertical side surface of said other jaw portion so as to cause said bobbin to rotate in a direction causing the yarn wound thereon to create an effective transfer tail when the bobbin is forced outwardly from said jaw portions of said shuttle spring.   
     
     
       2. The device of claim 1 wherein said vertical side surface having a greater vertical width includes a protubertant portion extending downwardly from a bottom edge of said vertical side surface providing an extended surface across which said bobbin passes when being forced outwardly from said jaw portions. 
     
     
       3. A bobbin holding device for holding a bobbin having yarn wound thereon in a loom shuttle comprising: a pair of spaced-apart jaw members having opposed vertical side surfaces for resiliently engaging and holding said bobbin therebetween,   means resiliently holding said jaw members in said opposed, spaced-apart relationship, and   one of said vertical side surfaces having a greater vertical width than the opposing vertical side surface of said other jaw portion, said one of said vertical side surfaces extending vertically below a lower edge of said opposing vertical side surface so as to impart a rotation to said bobbin to create an effective transfer tail of unused yarn when said bobbin is ejected from said jaw portion.